1. A cylinder block assembly, comprising:
a cylinder block including a cylinder, two crankshaft supports at a bottom of the cylinder block, first and second cylinder
block exterior sidewalls ending above a centerline of a crankshaft supported by the supports, where the two crankshaft supports
are formed out of a single continuous piece of material and surround the circumference of the crankshaft; and
a structural frame coupled to the cylinder block, the structural frame including first and second structural frame exterior
sidewalls extending above the centerline of the crankshaft and coupled to the first and second cylinder block exterior sidewalls.